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    <title>Document</title>
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<body>
    <div id="app"></div>
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    <script src="https://unpkg.com/vue@next"></script>
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        const ComponentName = {
            template: `
            <div> 局部组件： 1、my journey with vue</div>
            `
        }
        const app = Vue.createApp({
            components: {
                ComponentName
            },
               template:`
               <common-demo  />
               <component-name />
               `,
              
            })
            app.component('common-demo',{
               
                template:`
                <div>hello vue.js !</div>
                `
            })

           app.mount("#app");
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